转辙锁定 switch-and-lock movement: 转锁器lock switch: 带锁开关; 钥匙开关switch lock: 道岔锁闭器; 开关频; 开关锁; 替换船闸switch lock point lock: 道岔锁up lock and down lock switch: 上锁及下锁电门下载手机词典可随时随地查词查翻译